在微信小程序中如何使用数字滚动插件

<!--pages/main/index.wxml--><view class="animate-number">
 <view class="num num1">{{num1}}{{num1Complete}}</view>
 <view class="num num2">{{num2}}{{num2Complete}}</view>
 <view class="num num3">{{num3}}{{num3Complete}}</view>
 <view class="btn-box">
 <button bindtap="animate" type="primary" class="button">click me</button>
 </view></view>

// pages/main/index.jsimport NumberAnimate from "../../utils/NumberAnimate";Page({
 data:{ 
 },
 onLoad:function(options){
 // 页面初始化 options为页面跳转所带来的参数 
 },
 onReady:function(){ 
 },
 onShow:function(){
 
 // 页面显示
 },
 onHide:function(){
 // 页面隐藏
 }, 
 onUnload:function(){
 // 页面关闭 
 },
 //调用NumberAnimate.js中NumberAnimate实例化对象，测试3种效果
 animate:function(){
 
 this.setData({
 num1:'',
 num2:'',
 num3:'',
 num1Complete:'',
 num2Complete:'',
 num3Complete:''
 });
 
 let num1 = 18362.856;
 let n1 = new NumberAnimate({
 from:num1,//开始时的数字
 speed:2000,// 总时间
 refreshTime:100,// 刷新一次的时间
 decimals:3,//小数点后的位数
 onUpdate:()=>{//更新回调函数
 this.setData({
 num1:n1.tempValue });
 },
 onComplete:()=>{//完成回调函数
 this.setData({
 num1Complete:" 完成了"
 });
 }
 });
 
 let num2 = 13388;
 let n2 = new NumberAnimate({
 from:num2,
 speed:1500,
 decimals:0,
 refreshTime:100,
 onUpdate:()=>{
 this.setData({
 num2:n2.tempValue });
 },
 onComplete:()=>{
 this.setData({
 num2Complete:" 完成了"
 });
 }
 });
 
 let num3 = 2123655255888.86;
 let n3 = new NumberAnimate({
 from:num3,
 speed:2000,
 refreshTime:100,
 decimals:2,
 onUpdate:()=>{
 this.setData({
 num3:n3.tempValue });
 },
 onComplete:()=>{
 this.setData({
 num3Complete:" 完成了"
 });
 }
 });
 }})

/**
 * Created by wangyy on 2016/12/26.
 */'use strict';class NumberAnimate {
 
 constructor(opt) {
 let def = {
 from:50,//开始时的数字
 speed:2000,// 总时间
 refreshTime:100,// 刷新一次的时间
 decimals:2,// 小数点后的位数
 onUpdate:function(){}, // 更新时回调函数
 onComplete:function(){} // 完成时回调函数
 }
 this.tempValue = 0;//累加变量值
 this.opt = Object.assign(def,opt);//assign传入配置参数
 this.loopCount = 0;//循环次数计数
 this.loops = Math.ceil(this.opt.speed/this.opt.refreshTime);//数字累加次数
 this.increment = (this.opt.from/this.loops);//每次累加的值
 this.interval = null;//计时器对象
 this.init();
 }
 init(){
 this.interval = setInterval(()=>{this.updateTimer()},this.opt.refreshTime);
 }
 
 updateTimer(){
 
 this.loopCount++;
 this.tempValue = this.formatFloat(this.tempValue,this.increment).toFixed(this.opt.decimals);
 if(this.loopCount >= this.loops){
 clearInterval(this.interval);
 this.tempValue = this.opt.from;
 this.opt.onComplete();
 }
 this.opt.onUpdate();
 }
 //解决0.1+0.2不等于0.3的小数累加精度问题
 formatFloat(num1, num2) {
 let baseNum, baseNum1, baseNum2;
 try {
 baseNum1 = num1.toString().split(".")[1].length;
 } catch (e) {
 baseNum1 = 0;
 }
 try {
 baseNum2 = num2.toString().split(".")[1].length;
 } catch (e) {
 baseNum2 = 0;
 }
 baseNum = Math.pow(10, Math.max(baseNum1, baseNum2));
 return (num1 * baseNum + num2 * baseNum) / baseNum;
 };}export default NumberAnimate;